Now we present the thread/state prescription. In the framework of the holographic principle, bit threads are defined as divergenceless but unoriented bulk threads whose density is less than \(1/4{G_N}\)  everywhere [1]}, [2]}, [3]}. Bit threads can be described by the language of \(multiflow\) . In particular, a bit thread configuration that can simultaneously optimize (i.e., maximize, or “lock”) a set of thread fluxes through some specified boundary regions is referred to as a locking bit thread configuration [4]}. We will show that, following the prescription, a locking bit thread configuration can automatically determine the explicit form of the SS states of the bulk extremal surfaces.
